# 字典的元素的增加, 修改,删除; 并观察输出;
dic = {'Name': 'Dream', 'Age': 23, 'Class': 'First'}

del dic['Class']  # 删除键 'Class'
print(dic)
dic['Rank'] = 1  # 增加键 'Rank'
print(dic)
dic['Name'] = 'George'
print(dic)  # 修改

